/*
* The contents of this file are subject to the Mozilla Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is the Netscape security libraries.
*
* The Initial Developer of the Original Code is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1994-2000 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the
* terms of the GNU General Public License Version 2 or later (the
* "GPL"), in which case the provisions of the GPL are applicable
* instead of those above. If you wish to allow use of your
* version of this file only under the terms of the GPL and not to
* allow others to use your version of this file under the MPL,
* indicate your decision by deleting the provisions above and
* replace them with the notice and other provisions required by
* the GPL. If you do not delete the provisions above, a recipient
* may use your version of this file under either the MPL or the
* GPL.
*//*
* CMS digestedData methods.
*/
#include<Security/SecCmsDigestedData.h>
#include<Security/SecCmsContentInfo.h>
#include<Security/SecCmsDigestContext.h>
#include"cmslocal.h"
#include"secitem.h"
#include"secoid.h"
#include<security_asn1/secasn1.h>
#include<security_asn1/secerr.h>/*
* SecCmsDigestedDataCreate - create a digestedData object (presumably for encoding)
*
* version will be set by SecCmsDigestedDataEncodeBeforeStart
* digestAlg is passed as parameter
* contentInfo must be filled by the user
* digest will be calculated while encoding
*/
SecCmsDigestedDataRef
SecCmsDigestedDataCreate(SecCmsMessageRef cmsg, SECAlgorithmID *digestalg)
{
void *mark;
SecCmsDigestedDataRef digd;
PLArenaPool *poolp;
poolp = cmsg->poolp;
mark = PORT_ArenaMark(poolp);
digd = (SecCmsDigestedDataRef)PORT_ArenaZAlloc(poolp, sizeof(SecCmsDigestedData));
if (digd == NULL)
gotoloser;
digd->cmsg = cmsg;
if (SECOID_CopyAlgorithmID (poolp, &(digd->digestAlg), digestalg) != SECSuccess)
gotoloser;
PORT_ArenaUnmark(poolp, mark);
return digd;
loser:
PORT_ArenaRelease(poolp, mark);
return NULL;
}
/*
* SecCmsDigestedDataDestroy - destroy a digestedData object
*/voidSecCmsDigestedDataDestroy(SecCmsDigestedDataRef digd)
{
/* everything's in a pool, so don't worry about the storage */
SecCmsContentInfoDestroy(&(digd->contentInfo));
return;
}
/*
* SecCmsDigestedDataGetContentInfo - return pointer to digestedData object's contentInfo
*/
SecCmsContentInfoRef
SecCmsDigestedDataGetContentInfo(SecCmsDigestedDataRef digd)
{
return &(digd->contentInfo);
}
/*
* SecCmsDigestedDataEncodeBeforeStart - do all the necessary things to a DigestedData
* before encoding begins.
*
* In particular:
* - set the right version number. The contentInfo's content type must be set up already.
*/
OSStatus
SecCmsDigestedDataEncodeBeforeStart(SecCmsDigestedDataRef digd)
{
unsignedlong version;
CSSM_DATA_PTR dummy;
version = SEC_CMS_DIGESTED_DATA_VERSION_DATA;
if (SecCmsContentInfoGetContentTypeTag(&(digd->contentInfo)) != SEC_OID_PKCS7_DATA)
version = SEC_CMS_DIGESTED_DATA_VERSION_ENCAP;
dummy = SEC_ASN1EncodeInteger(digd->cmsg->poolp, &(digd->version), version);
return (dummy == NULL) ? SECFailure : SECSuccess;
}
/*
* SecCmsDigestedDataEncodeBeforeData - do all the necessary things to a DigestedData
* before the encapsulated data is passed through the encoder.
*
* In detail:
* - set up the digests if necessary
*/
OSStatus
SecCmsDigestedDataEncodeBeforeData(SecCmsDigestedDataRef digd)
{
/* set up the digests */if (digd->digestAlg.algorithm.Length != 0 && digd->digest.Length == 0) {
/* if digest is already there, do nothing */
digd->contentInfo.digcx = SecCmsDigestContextStartSingle(&(digd->digestAlg));
if (digd->contentInfo.digcx == NULL)
return SECFailure;
}
return SECSuccess;
}
/*
* SecCmsDigestedDataEncodeAfterData - do all the necessary things to a DigestedData
* after all the encapsulated data was passed through the encoder.
*
* In detail:
* - finish the digests
*/
OSStatus
SecCmsDigestedDataEncodeAfterData(SecCmsDigestedDataRef digd)
{
OSStatus rv = SECSuccess;
/* did we have digest calculation going on? */if (digd->contentInfo.digcx) {
rv = SecCmsDigestContextFinishSingle(digd->contentInfo.digcx,
(SecArenaPoolRef)digd->cmsg->poolp, &(digd->digest));
/* error has been set by SecCmsDigestContextFinishSingle */
digd->contentInfo.digcx = NULL;
}
return rv;
}
/*
* SecCmsDigestedDataDecodeBeforeData - do all the necessary things to a DigestedData
* before the encapsulated data is passed through the encoder.
*
* In detail:
* - set up the digests if necessary
*/
OSStatus
SecCmsDigestedDataDecodeBeforeData(SecCmsDigestedDataRef digd)
{
/* is there a digest algorithm yet? */if (digd->digestAlg.algorithm.Length == 0)
return SECFailure;
digd->contentInfo.digcx = SecCmsDigestContextStartSingle(&(digd->digestAlg));
if (digd->contentInfo.digcx == NULL)
return SECFailure;
return SECSuccess;
}
/*
* SecCmsDigestedDataDecodeAfterData - do all the necessary things to a DigestedData
* after all the encapsulated data was passed through the encoder.
*
* In detail:
* - finish the digests
*/
OSStatus
SecCmsDigestedDataDecodeAfterData(SecCmsDigestedDataRef digd)
{
OSStatus rv = SECSuccess;
/* did we have digest calculation going on? */if (digd->contentInfo.digcx) {
rv = SecCmsDigestContextFinishSingle(digd->contentInfo.digcx,
(SecArenaPoolRef)digd->cmsg->poolp, &(digd->cdigest));
/* error has been set by SecCmsDigestContextFinishSingle */
digd->contentInfo.digcx = NULL;
}
return rv;
}
/*
* SecCmsDigestedDataDecodeAfterEnd - finalize a digestedData.
*
* In detail:
* - check the digests for equality
*/
OSStatus
SecCmsDigestedDataDecodeAfterEnd(SecCmsDigestedDataRef digd)
{
/* did we have digest calculation going on? */if (digd->cdigest.Length != 0) {
/* XXX comparision btw digest & cdigest *//* XXX set status *//* TODO!!!! */
}
return SECSuccess;
}